April brought warmer weather, though the ground was still covered with snow, and much boat-building went on. In May swans had appeared on the lake, then came geese, then ducks, then gulls and singing birds. By June the boats were afloat, and on the 24th the whole party embarked for the Mackenzie River and were soon making their way to the mouth. Here the party divided. Franklin on board the _Lion_, with a crew of six, accompanied by Back on board the _Reliance_, started westwards, while Richardson's party was to go eastwards and survey the coast between the mouth of the Mackenzie River and the Copper Mine. On 7th July, Franklin reached the sea, and, with flags flying, the _Lion_ and the _Reliance_ sailed forth on the unknown seas, only to ground a mile from shore. Suddenly some three hundred canoes full of Eskimos crowded towards them. These people had never seen a white man before, but when it was explained to them that the English had come to find a channel for large ships to come and trade with them, they "raised the most deafening shout of applause." They still crowded round the little English boats, till at last, like others of their race, they began to steal things from the boats. When detected they grew furious and brandished knives, they tore the buttons off the men's coats, and for a time matters looked serious till the English showed their firearms, when the canoes paddled away and the Eskimos hid themselves. With a fair wind the boats now sailed along the coast westward, till stopped by ice, which drove them from the shore. Dense fogs, stormy winds, and heavy rain made this Polar navigation very dangerous; but the explorers pushed on till, on 27th July, they reached the mouth of a broad river which, "being the most westerly river in the British dominions on this coast and near the line of demarcation between Great Britain and Russia, I named it the Clarence," says Franklin, "in honour of His Royal Highness the Lord High Admiral." A box containing a royal medal was deposited here, and the Union Jack was hoisted amid hearty cheers. [Illustration: FRANKLIN'S EXPEDITION CROSSING BACK'S INLET. From a drawing, by Lieut. Back, in Franklin's _Second Expedition to the Polar Sea_, 1828.]